From 8ba5fa67b85f7c661badc158a491cf34015710b4 Mon Sep 17 00:00:00 2001
From: Tomas Maly <malytomas@ucpu.cz>
Date: Fri, 24 Nov 2023 12:21:47 +0100
Subject: [PATCH] make guiInWorld tolerant to invalid rays

---
 sources/libsimple/guiInWorld.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sources/libsimple/guiInWorld.cpp b/sources/libsimple/guiInWorld.cpp
index 4851239d..ee13d5ac 100644
--- a/sources/libsimple/guiInWorld.cpp
+++ b/sources/libsimple/guiInWorld.cpp
@@ -43,7 +43,7 @@ namespace cage
 
 			struct Intersection
 			{
-				Vec3 wp; // world position
+				Vec3 wp = Vec3::Nan(); // world position
 				Vec2 gp; // gui position in 0*0 .. w*h
 				bool intersects = false;
 			};
@@ -51,6 +51,8 @@ namespace cage
 			CAGE_FORCE_INLINE Intersection detect(const Line &ray) const
 			{
 				Intersection res;
+				if (!ray.valid())
+					return res;
 				const Transform tr = config.renderEntity->value<TransformComponent>();
 				const Plane pl = Plane(tr.position, tr.orientation * Vec3(0, 0, -1));
 				res.wp = cage::intersection(pl, ray);